The detection of neutrino interactions in the emulsion ... - opera - Infn

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The detection of neutrino interactions in the emulsion ... - opera - Infn

X

Z

5 m

Y

Z

5 m

2 mm

2 mm

1 mm

1 mm

1 mm

1 mm

X

Y

Y

Z

Z

upstream layer

X

downstream layer

170 µ m

170 µ m

muon

250 µ m

250 µ m

Figure 11: Display of the OPERA electronic detector of a ν µ CC interaction, top and side views. The

emulsion reconstruction is shown in the middle panels: top view (left), side view (center), frontal view

(right). The dashed line shows a track that has been validated manually. Bottom left panel: picture

of the interaction vertex as seen by the microscope CMOS camera. The nuclear fragments produced in

the interaction are visible. Bottom right panel: picture taken about 200 micron far from the interaction

vertex. The minimum ionizing particles produced in the interaction are indicated by a circle. The muon

track is also indicated.

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